Human Behavioral Biology, a Stanford course taught by Robert Sapolsky. It's a thorough look on some of our behaviors through the lens of hormones, neural/nervous system, and how evolution shaped us. Also, Pr Sapolsky is a great speaker with a complete deadpan humor.
https://www.youtube.com/watch?v=NNnIGh9g6fA&list=PL848F2368C...